A used Musical Fidelity VDAC or VDAC II would be a good bet and both have the USB type B connector.
At the less expensive end, the Audioengine D1 is a good value. It does have a headphone amp built in and I don't know how it would compare with your EMU DAC.
I've had a couple of Chinese DACs, from Valab and Aune. I didn't care for the Valab - it had a slight hum, ran very hot and didn't sound great in my system. The Aune was much better built and sounded good at the price. Again, I don't have any way to compare to your current DAC.
At the less expensive end, the Audioengine D1 is a good value. It does have a headphone amp built in and I don't know how it would compare with your EMU DAC.
I've had a couple of Chinese DACs, from Valab and Aune. I didn't care for the Valab - it had a slight hum, ran very hot and didn't sound great in my system. The Aune was much better built and sounded good at the price. Again, I don't have any way to compare to your current DAC.